Ceria and lanthana as blocking modifiers for the external surface of MFI zeolite

作者: Hoi-Gu Jang , Kwang Ha , Jong-Ho Kim , Yoshihiro Sugi , Gon Seo

DOI: 10.1016/J.APCATA.2014.02.028

关键词: Economies of agglomerationPorosityLanthanideCatalysisInorganic chemistryCrystallinityChemistryZeolitePhase (matter)Methanol

摘要: The ceria- and lanthana-modified MFI zeolites were prepared extensively investigated to verify the function of lanthanide oxides as blocking modifiers. Their catalytic behavior in methanol-to-olefin (MTO) conversion was explained by characterization results regarding crystallinity, agglomeration, porosity, surface composition, uptakes o-xylene methanol. ceria impregnated on formed nano-sized small particles with two oxidation states +3 +4 (Ce2O3 CeO 2) located predominantly external surface. So, impregnation maintained porosity activity MFI, induced little change product composition MTO. However, lanthana dispersed a single (La2O3) phase its micropores, well micropores reduction acidity lowered did not have any negative effects performance, while locations systematically discussed relation their performance

参考文章(25)
S Tawada, Y Sugi, Y Kubota, Y Imada, T Hanaoka, T Matsuzaki, K Nakajima, K Kunimori, J.-H Kim, Ceria-modification of H-mordenites. The deactivation of external acid sites in the isopropylation of biphenyl and the isomerization of 4,4'-diisopropylbiphenyl Catalysis Today. ,vol. 60, pp. 243- 253 ,(2000) , 10.1016/S0920-5861(00)00341-2
Cristina Martínez, Avelino Corma, Inorganic molecular sieves: Preparation, modification and industrial application in catalytic processes Coordination Chemistry Reviews. ,vol. 255, pp. 1558- 1580 ,(2011) , 10.1016/J.CCR.2011.03.014
Nazi Rahimi, Ramin Karimzadeh, Catalytic cracking of hydrocarbons over modified ZSM-5 zeolites to produce light olefins: A review Applied Catalysis A-general. ,vol. 398, pp. 1- 17 ,(2011) , 10.1016/J.APCATA.2011.03.009
Katia Barbera, Francesca Bonino, Silvia Bordiga, Ton V.W. Janssens, Pablo Beato, Structure–deactivation relationship for ZSM-5 catalysts governed by framework defects Journal of Catalysis. ,vol. 280, pp. 196- 205 ,(2011) , 10.1016/J.JCAT.2011.03.016
Kwang Young Lee, Ho-Jeong Chae, Soon-Yong Jeong, Gon Seo, None, Effect of crystallite size of SAPO-34 catalysts on their induction period and deactivation in methanol-to-olefin reactions Applied Catalysis A-general. ,vol. 369, pp. 60- 66 ,(2009) , 10.1016/J.APCATA.2009.08.033
Ping Lu, Zhaoyang Fei, Lei Li, Xinzheng Feng, Weijie Ji, Weiping Ding, Yi Chen, Weiming Yang, Zaiku Xie, Effects of controlled SiO2 deposition and phosphorus and nickel doping on surface acidity and diffusivity of medium and small sized HZSM-5 for para-selective alkylation of toluene by methanol Applied Catalysis A-general. ,vol. 453, pp. 302- 309 ,(2013) , 10.1016/J.APCATA.2012.12.042
Chokkalingam Anand, Tomonori Sugimura, Kenichi Komura, Yoshihiro Kubota, Jong-Ho Kim, Gon Seo, Ajayan Vinu, Yoshihiro Sugi, The isopropylation of biphenyl over H-mordenite: roles of 3- and 4-isopropylbiphenyls Korean Journal of Chemical Engineering. ,vol. 30, pp. 1043- 1050 ,(2013) , 10.1007/S11814-013-0011-1
Jian Liu, Chenxi Zhang, Zhenhao Shen, Weiming Hua, Yi Tang, Wei Shen, Yinghong Yue, Hualong Xu, Methanol to propylene: Effect of phosphorus on a high silica HZSM-5 catalyst Catalysis Communications. ,vol. 10, pp. 1506- 1509 ,(2009) , 10.1016/J.CATCOM.2009.04.004
Olga V. Manoilova, Simon G. Podkolzin, Balarishna Tope, Johannes Lercher, Eric E. Stangland, Jean-Michel Goupil, Bert M. Weckhuysen, Surface Acidity and Basicity of La2O3, LaOCl, and LaCl3 Characterized by IR Spectroscopy, TPD, and DFT Calculations Journal of Physical Chemistry B. ,vol. 108, pp. 15770- 15781 ,(2004) , 10.1021/JP040311M
S ZHENG, A JENTYS, J LERCHER, Xylene isomerization with surface-modified HZSM-5 zeolite catalysts: An in situ IR study Journal of Catalysis. ,vol. 241, pp. 304- 311 ,(2006) , 10.1016/J.JCAT.2006.04.026